Vickers pyramid number

Vickers pyramid number

Dictionary of units of measurement. 2015.

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  • Vickers hardness number — (HV or VHN) or Vickers pyramid number (VPN)    a measure of the hardness of a metal introduced by Vickers in 1922. In the Vickers test (suitable for surface hardened metals), a pyramidal diamond is pressed into the material being tested. The… …   Dictionary of units of measurement

  • Vickers hardness number — a number indicative of the degree of relative hardness of materials, determined by measuring the long diagonals of indentation made by pressing the pyramidal point of a diamond into the surface of the material being tested; equal to the load in… …   Medical dictionary

  • Vickers hardness test — A Vickers hardness tester The Vickers hardness test was developed in 1924 by Smith and Sandland at Vickers Ltd as an alternative to the Brinell method to measure the hardness of materials.[1] The Vickers test is often easier to use than other… …   Wikipedia

  • diamond pyramid hardness — Vickers hardness number …   Medical dictionary

  • Vickers hardness — ▪ mineralogy       a measure of the hardness of a material, calculated from the size of an impression produced under load by a pyramid shaped diamond indenter. Devised in the 1920s by engineers at Vickers, Ltd., in the United Kingdom, the diamond …   Universalium

  • Indentation hardness — tests are used to determine the hardness of a material to deformation. Several such tests exist, wherein the examined material is indented until an impression is formed; these tests can be performed on a macroscopic or microscopic scale. When… …   Wikipedia

  • VPN (disambiguation) — VPN may refer to:* Vickers Pyramid Number, a material hardness value * Victorian Photonics Network, Australian organisation * Vietnam People s Navy * Virtual phone number * Virtual private network * Vopnafjörður, village in the north eastern part …   Wikipedia

  • число твёрдости по Виккерсу — твёрдость по Виккерсу — [А.С.Гольдберг. Англо русский энергетический словарь. 2006 г.] Тематики энергетика в целом Синонимы твёрдость по Виккерсу EN Vickers numberdiamond pyramid hardness numberDPHNVickers hardness numberVHNVi …   Справочник технического переводчика

  • community ecology — Introduction       study of the organization and functioning of communities (community), which are assemblages of interacting populations of the species living within a particular area or habitat.       As populations of species interact with one …   Universalium

  • steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …   Universalium

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